Standard library header <codecvt> (C++11) (deprecated in C++17) (removed in C++26)

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C++
Standard library headers

This header is part of the localization library .

Classes

(C++11) (deprecated in C++17) (removed in C++26)
converts between UTF-8 and UCS-2/UCS-4
(class template)
(C++11) (deprecated in C++17) (removed in C++26)
converts between UTF-16 and UCS-2/UCS-4
(class template)
(C++11) (deprecated in C++17) (removed in C++26)
converts between UTF-8 and UTF-16
(class template)
(C++11) (deprecated in C++17) (removed in C++26)
tags to alter behavior of the standard codecvt facets
(enum)

Notes

<codecvt> is deprecated in C++17 and removed in C++26 (see P2871R3 ).

The reason for removal is that this feature no longer implements the current Unicode Standard , supporting only the obsolete UCS-2 encoding.

Synopsis 

namespace std {
  enum codecvt_mode {
    consume_header = 4,
    generate_header = 2,
    little_endian = 1
  };
 
  template<class Elem, unsigned long Maxcode = 0x10ffff,
           codecvt_mode Mode = (codecvt_mode)0>
    class codecvt_utf8;
 
  template<class Elem, unsigned long Maxcode = 0x10ffff,
           codecvt_mode Mode = (codecvt_mode)0>
    class codecvt_utf16;
 
  template<class Elem, unsigned long Maxcode = 0x10ffff,
           codecvt_mode Mode = (codecvt_mode)0>
    class codecvt_utf8_utf16;
}

Class std::codecvt_utf8 

namespace std {
  template<class Elem, unsigned long Maxcode = 0x10ffff,
           codecvt_mode Mode = (codecvt_mode)0>
    class codecvt_utf8 : public codecvt<Elem, char, mbstate_t> {
    public:
      explicit codecvt_utf8(size_t refs = 0);
      ~codecvt_utf8();
    };
}

Class std::codecvt_utf16 

namespace std {
  template<class Elem, unsigned long Maxcode = 0x10ffff,
           codecvt_mode Mode = (codecvt_mode)0>
    class codecvt_utf16 : public codecvt<Elem, char, mbstate_t> {
    public:
      explicit codecvt_utf16(size_t refs = 0);
      ~codecvt_utf16();
    };
}

Class std::codecvt_utf8_utf16 

namespace std {
  template<class Elem, unsigned long Maxcode = 0x10ffff,
           codecvt_mode Mode = (codecvt_mode)0>
    class codecvt_utf8_utf16 : public codecvt<Elem, char, mbstate_t> {
    public:
      explicit codecvt_utf8_utf16(size_t refs = 0);
      ~codecvt_utf8_utf16();
    };
}
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